Multi-ply sealing rings and methods for manufacturing same

Abstract

A multi-ply sealing ring and method of manufacturing same. Two annular members are nested one within the other and then welded together at equi-distant intervals to form a plurality of annular weld zones. The two annular members are then cut along the weld zones to form a plurality of multi-ply cylindrical bands having weld-sealed opposite axial ends. Each cylindrical band is then formed to include a sealing profile.

What is claimed is: 
     
       1. A method of manufacturing a sealing ring, comprising the steps of: nesting a first annular member within a second annular member, the first and second annular members being coaxial and in intimate surface contact with each other along an interface therebetween;   welding the first and second annular members together at equi-distant intervals, thus forming a plurality of annular weld zones;   cutting the first and second annular members along the annular weld zones to form a plurality of multi-ply cylindrical bands, each having first and second, weld-sealed opposite ends; and   forming each cylindrical band into a sealing profile.   
     
     
       2. A method of manufacturing a sealing ring according to claim 1, further comprising forming at least one vent hole in the annular member disposed on a side opposite a high pressure side of the sealing ring. 
     
     
       3. A method of manufacturing a sealing ring according to claim 1, further comprising cold working and smoothing the weld lines before cutting and after welding. 
     
     
       4. A method of manufacturing a sealing ring comprising the steps of: nesting a first annular member within a second annular member, the first and second annular members being coaxial and in intimate surface contact with each other, and having mutual opposite axial ends;   welding the first and second annular members together at the opposite axial ends, thus forming a multi-ply cylindrical band; and   forming the multi-ply cylindrical band into a seal.   
     
     
       5. A method of manufacturing a sealing ring comprising the steps of: nesting a first annular member within a second annular member, the first and second annular members being coaxial and in intimate surface contact with each other, and having mutual opposite axial ends;   welding the first and second annular members together at the opposite axial ends, thus forming a multi-ply cylindrical band; and   forming the multi-ply cylindrical band into a sealing profile,   wherein prior to nesting, the method includes forming at least one vent hole in the annular member disposed on a side opposite a high pressure side of the sealing ring.   
     
     
       6. A method of manufacturing a sealing ring comprising the steps of: nesting a first annular member within a second annular member, the first and second annular members being coaxial and in intimate surface contact with each other, and having mutual opposite axial ends;   welding the first and second annular members together at the opposite axial ends, thus forming a multi-ply cylindrical band; and   forming the multi-ply cylindrical band into a V-shaped sealing profile.   
     
     
       7. A method of manufacturing a sealing ring comprising the steps of: nesting a first annular member within a second annular member, the first and second annular members being coaxial and in intimate surface contact with each other, and having mutual opposite axial ends;   welding the first and second annular members together at the opposite axial ends, thus forming a multi-ply cylindrical band; and   forming the multi-ply cylindrical band into a C-shaped sealing profile.   
     
     
       8. A method of manufacturing a sealing ring comprising the steps of: nesting a first annular member within a second annular member, the first and second annular members being coaxial and in intimate surface contact with each other, and having mutual opposite axial ends;   welding the first and second annular members together at the opposite axial ends, thus forming a multi-ply cylindrical band; and   forming the multi-ply cylindrical band into a convolution sealing profile.